Fire Sphere Cycle (FSC) Earth System Coupling Model: A Unified Framework for Interpreting Life Origin and Evolution, Algal Productivity, Fossil Energy Enrichment, and Global Marine Mass Extinctions

Abstract

The Fire-Sediment Cycle (FSC) model proposes a unified Earth system framework linking life origin, Phanerozoic mass extinctions, and fossil energy accumulation to periodic paleowildfire activity. The model identifies wildfire as a planetary-scale endogenous regulatory agent, driven by four geological functions: mineral activation and nitrogen fixation via high-temperature combustion; terrestrial biodiversity regulation through a "refuge cage" effect; cross-basin organic carbon transport and burial; and long-term biotic decline that primes ecosystems for terminal exogenous catastrophes. The FSC establishes a "long-term endogenous disturbance + short-term exogenous pulse" dual evolutionary paradigm, integrating global stratigraphic records, geochemical proxies, and paleoecological datasets. This framework offers a complementary explanation for traditional catastrophe theories and provides testable predictions for paleoecological succession, global carbon cycling, and fossil energy exploration. 炎球循环(FSC)模型提出了一套统一的地球系统演化框架,将生命起源、显生宙生物大灭绝与化石能源富集归因于周期性古火活动。该模型将古火定义为一类行星尺度内源调控因子,驱动四类地质作用:高温燃烧实现矿物活化与固氮;“牢笼效应”调控陆地生物多样性;跨流域陆海有机碳搬运与埋藏;长期生态衰退为终端外源灾变铺垫。模型构建了“长期内源扰动+短期外源脉冲”二元演化范式,整合全球地层记录、地球化学代用指标与古生态数据集,为传统灾变理论提供补充解释路径,并为古生态演替、全球碳循环与化石能源勘探提供可检验的预测框架。